When i print it pulls the paper through but with no print on paper

The reason for that is the front is the paper output tray, the rear tray is where you load the paper. Anything you print, copy, or scanned (to print) will come out the output tray (in front) and will pull paper from the rear tray.

Have you read the Manual on paper removal? It mentions a rear panel that can be removed. That might free up the rollers:
If the paper jam is near the paper input tray:
1. Remove the paper tray.
2. Pull firmly on the paper to remove it.
3. Replace the paper tray.
4. Press the Select button .
5. Resend your print job to print any missing pages.
If the paper jam is not visible:
1. Turn off the printer.
2. Lift the printer unit.
3. Firmly grasp the paper, and gently pull it from the printer.
4. Close the printer unit.
5. Turn on the printer, and print the document again.
If the jam is located in the duplex unit or near the rear access door:
1. If you have a duplex unit, remove it.
2. Open the rear access door.
3. Firmly grasp the paper, and gently pull it from the printer.
4. Close the rear access door.
5. Re-install the duplex unit.
6. Press the Select button to continue printing.
If the paper jam occurs near the ADF:
1. Lift the ADF cover located to the left of the ADF input tray.
2. Firmly grasp the paper, and then gently pull it from the printer.
3. Close the ADF cover.
4. Press the Select button .
5. Resend your print job to print any missing pages.

When I print a drawing on A3 size paper the hp deskjet printer 1280 is
giving a blank sheets but When I print the drawing on A4 it prints fine

open the printer remove the toner and slowly pull the paper out. Pull in the natural printing direction of the printer, so if the printer pulls the paper from top-tray to bottom-tray when printing you should pull the paper from the bottom tray outwards

on your msworl click print,

1.0 properties
2.0 paper size just drag to the bottom one
3.0 click costumise paper
4.0 click ok

Thanks!

Hi,
Remove the jammed paper. Unplug the printer from the mains and PC. Inspect the rollers, etc for tiny paper piece(s) that may be stuck, or other debris. Try to clean rollers and make sure they are dry.
Keep printer unplugged for about 2 minutes and replug and try a test print.
Also make sure that you have waited long enough for the printer to heat up before giving a print job.
Finally, it could be an issue with the paper sensor. If this is the case, you will probably have to take the printer in for servicing..

Hope that helps!
PREM

Hi,
Sounds like the feed rollers need cleaning.
Clean the feed rollers, lint free cloth,bottled water.
wait for them to properly dry

Revolve the feed roller bar as you clean them, to clean the feed rollers all the way round, remove all particles from them.

Check you ADF grips are set correctly, if not you will get mis-fed sheets. check the tray is sat properly too or mis-feeds.

Check paper size is correct in print properties too.
Should be good then
Try print.

Regards
Richard.

You have a broken gear main motor. I had the same problem, bought $5 part and after the replacement of the gear,it runs like new

Some rubber lining or rollers is out of line, if you can fix that it may work properly.

Try cleaning the feed rollers. these are the rubber wheels that actually contact the paper and pull it through. If they get dirty, their grip on the paper will be less than adequate. Just use some clean water, or perhaps some rubbing alcohol, and a clean rag to wipe them thoroughly.